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Method and device for detecting abnormal sound of high-pressure oil pump of automobile engine

A technology of automobile engine and high-pressure oil pump, which is applied in the direction of machine/engine, pump testing, mechanical equipment, etc., can solve the problem of not being able to judge the high-pressure oil pump of the engine in a timely and accurate manner, so as to improve the efficiency of abnormal noise detection, reduce maintenance costs, improve The effect of detection accuracy

Active Publication Date: 2017-06-06
BEIQI FOTON MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For this reason, the technical problem to be solved by the present invention lies in the problem in the prior art that the abnormal sound of the high-pressure oil pump of the engine cannot be judged timely and accurately, thus a method and device for detecting the abnormal sound of the high-pressure oil pump of the automobile engine are proposed

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  • Method and device for detecting abnormal sound of high-pressure oil pump of automobile engine
  • Method and device for detecting abnormal sound of high-pressure oil pump of automobile engine
  • Method and device for detecting abnormal sound of high-pressure oil pump of automobile engine

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Embodiment 1

[0059] Please refer to figure 1 , figure 1 It is a structural schematic diagram of the abnormal noise detection device 1 of the high-pressure oil pump of the automobile engine according to Embodiment 1 of the present invention.

[0060] Embodiment 1 of the present invention provides a detection device 1 for a high-pressure oil pump of an automobile engine. The output end of 110 connects the input end of amplifier 120, the output end of amplifier 120 connects the input end of filter 130, the output end of filter 130 connects the input end of A / D converter 140, the output end of A / D converter 140 The input end of the computer is connected, and the output end of the computer is connected with the early warning device 160 .

[0061] The sound sensor is fixed on a fixed bracket placed close to the high-pressure oil pump, and the distance between the fixed bracket and the high-pressure oil pump is preferably within a range of 50 cm. The sound sensor is used to collect the sound s...

Embodiment 2

[0065] Embodiment 2 provides a method for detecting abnormal sound of a high-pressure oil pump of an automobile engine. The detection method includes: fixing the sound sensor on a fixed bracket placed close to the high-pressure oil pump, and the distance between the fixed bracket and the high-pressure oil pump is preferably within 50cm. The sound sensor 110 is used to collect the sound signal from the high-pressure oil pump, and convert the sound signal into an electrical signal; the amplifier 120 receives the signal from the sound sensor 110, amplifies the signal and outputs it to the filter 130; the filter 130 processes the signal After filtering, the signal is transmitted to the A / D converter 140, and the amplified and filtered electrical signal is converted into a digital signal through the A / D converter 140; the A / D converter 140 is connected to the computer 150;

[0066] The computer 150 pre-stores the digital signal of the sound of the high-pressure oil pump running und...

Embodiment 3

[0076] Please refer to image 3 , image 3 It is a structural schematic diagram of the abnormal sound detection device 2 of the high-pressure oil pump of the automobile engine according to Embodiment 3 of the present invention.

[0077] Compared with the automobile engine high-pressure oil pump detection device 2 in the embodiment 3 of the present invention, the automobile engine high-pressure oil pump detection device 1 has increased a pickup 270 and an earphone 280, and the pickup 270 and the sound sensor 210 are fixed together in a close The high-pressure oil pump is placed on a fixed bracket, and the distance between the fixed bracket and the high-pressure oil pump is preferably within a range of 50 cm. The pickup 270 is also used to collect the sound signal from the high-pressure oil pump. The earphone 280 connected to the pickup 270 can be used for the staff to monitor the working sound of the high-pressure oil pump in real time, and store the sound source of the abnorm...

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Abstract

A method for detecting abnormal noise of the high pressure oil pump of an automobile engine comprises the following steps: collecting sound signals of the high pressure oil pump with an acoustic sensor; converting the sound signals into electrical signals; connecting the acoustic sensor with an amplifier, a filter, an A / D converter and a computer in sequence; magnifying the electrical signals with the amplifier; filtering the magnified signals with the filter; transmitting the filtered signals to the A / D converter for analog-digital conversion; outputting digital signals I to the computer. The computer is used for pre-saving of digital signals II of sound showing that the high pressure oil pump works in a normal state in the computer, receiving the digital signals I obtained through conversion of the A / D converter, and analyzing the digital signals I with the digital signals II, so as to judge whether a sound is abnormal noise or not. Through the adoption of the method, the problem that abnormal noise of the high pressure oil pump of the engine cannot be judged promptly and accurately in the prior art is solved.

Description

technical field [0001] The invention relates to the technical field of automobile engines, in particular to a method and a device for detecting abnormal sound of a high-pressure oil pump in an automobile engine fuel system. Background technique [0002] The engine is the heart of the car, and its working state determines the normal operation of the car. Abnormal noises produced by the engine during operation that exceed the specifications specified in the technical documents are called abnormal noises. The abnormal sound indicates that some parts of the engine have failed, and if the fault is not eliminated in time, it may cause greater damage. [0003] As far as the high-pressure oil pump in the engine is concerned, under normal circumstances, there will be a regular "da da da" sound due to the opening and closing of the valve needle. But sometimes there will be other irregular sounds, which are abnormal sounds. If they are not controlled in time, they will become more vi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B51/00
Inventor 李燕芳李强马和新高伟
Owner BEIQI FOTON MOTOR CO LTD